Keep Your Subject in Focus When Filming Alone (6 Tips)

Most solo filmmakers lose shots to soft focus, not because they lack skill, but because they're using techniques built for two-person crews.

I've spent over 15 years filming documentaries on my own, from Red Bull helicopter jumps to remote wildlife shoots. Keeping your subject in focus when filming alone comes down to six practical techniques that don't need expensive gear or a dedicated focus puller. Here's what actually works.

What's in This Post

• Quick checklist: how to keep focus when filming alone
• Six focus techniques for solo filmmakers
• Manual focus vs autofocus for documentaries
• Frequently asked questions

Quick Checklist: How to Keep Focus When Filming Alone

• Use fixed focus for static shots
• Walk in sync with your subject
• Pre-focus on a point in the scene
• Use a high f-stop for deep focus
• Practise manual focus on the move
• Use autofocus with face/subject tracking

How to Keep Your Subject in Focus When Filming by Yourself

Here are six ways to keep your subject in focus when filming documentaries by yourself.

1. Use Fixed Focus for Static Shots

This is the simplest technique. Use it when filming documentary interviews or portrait-style shots where both the camera and subject stay still.

Adjust the focus ring manually until your subject is sharp. Once set, don't move the camera or the subject.

2. Walk in Sync With Your Subject

Set the focus distance first. Then, as your subject moves, match their pace exactly, walking forward or backward while maintaining the same distance. This keeps your subject in focus without having to pull focus manually.

It takes a bit of practice, but it's very effective once you get the hang of it. This technique pairs well with a gimbal or shoulder rig that keeps your camera movement steady.

3. Pre-Focus and Let the Subject Enter the Frame

Set the focus on a point in the scene, like a mark on the floor or a doorway, then wait for the subject to move into that area. The key is choosing a spot where you know your subject will pass through.

This works well when filming moments that can't be repeated.

4. Use a High F-stop for Deep Focus

Increasing your aperture to something like f/8 or higher makes more of the scene sharp, front to back. This is useful when you can't risk missing focus. I used this while filming a one-take helicopter jump for Red Bull, there was no second chance.

The downside is that you lose shallow depth of field, so the shot will look less cinematic. Use this for action scenes or wide shots where focus matters more than blur. For more on how aperture, frame rate, and shutter speed work together, see our cinematic camera settings checklist.

5. Practise Manual Focus

Manual focus gives you the most control, but it takes skill. Keep one hand on the focus ring and adjust as your subject moves. Use an external monitor if you can, especially outdoors. A follow focus attachment can help too.

One tip: practise with a moving object. I used to push a swing back and forth and try to keep the seat in focus. It's a great way to train your eye and hands to work together.

6. Use Autofocus (If Your Camera Supports It)

Autofocus has improved massively in the past decade. Canon's Dual Pixel AF (first introduced in the 70D), Sony's Real-time Eye AF, and Panasonic's hybrid systems now offer excellent face and subject tracking.

If your camera supports it, autofocus can be a lifesaver, especially when filming unpredictable moments on your own. Just be aware it's not foolproof. It can focus on the wrong part of the frame, so it's worth testing before trusting it for important scenes.

Manual Focus vs Autofocus for Solo Documentary Filmmakers

Manual focus gives you full creative control. You decide exactly what's sharp and what's not. This is important in documentary filmmaking, where the focus point can shape meaning.

But if you're filming solo and reacting to real moments, autofocus can be a powerful tool. The key is to know when to use each. Use manual focus when you want to guide the viewer's attention with intention. Use autofocus when you need to capture fast-moving action or don't have time to pull focus manually.

If you're planning your first solo shoot, our solo documentary filmmaking guide covers gear, planning, and workflow from start to finish.

Frequently Asked Questions

How do you focus when filming yourself?

Place a stand-in object (like a light stand or chair) where you'll be sitting or standing. Focus on that object manually, then lock the focus. Switch to your position without touching the focus ring. If your camera has face-detect autofocus, you can also use that to track your face once you're in frame.

What's the best autofocus camera for solo filmmakers?

Popular options on a budget include the Canon R6, Sony FX30, and Panasonic GH7. All offer strong autofocus systems designed for video.

How do you keep a moving subject in focus without a focus puller?

Set the focus distance and walk in sync with your subject, or use autofocus with subject tracking. Manual focus is possible with practice.

Should I use autofocus or manual focus for documentaries?

Use autofocus for fast-paced or solo shoots. Use manual focus when you want precise, controlled shots with intentional storytelling.

What f-stop keeps everything in focus?

An aperture of f/8 to f/11 gives you deep focus on most lenses. The higher the f-stop number, the more of the scene stays sharp. The trade-off is you'll need more light and you'll lose that shallow depth-of-field look.

Final Thoughts: How to Keep Your Subject in Focus

Keeping your subject in focus takes practice, especially when filming alone. But you don't need expensive gear to get it right. With these six techniques, you can capture sharp, intentional footage whether you're filming interviews, scenes in motion, or unpredictable real-life moments.